something something ad-hominems don't really prove a point something something something. It is true though. Also his wiki article mentions his work receives mixed reviews: positive reviews for bringing philosophy to a wider audience, and negative for pompously restating the obvious and lack of focus. Everyone who wants to get philosophy to a wider audience gets the same criticisms, probably because only someone searching for the same revelation the author was will find it in his work.
His background gives some insight into why he thinks the way he does. If the article was "Why I will marry the wrong person" his background would be completely relevant. But he didn't so whether what he wrote applies to the world or its just crap is what is relevant.